"At first, indeed, before she is excited by science, she is oppressed with lethargy, and clouded with oblivion; but in proportion as learning and enquiry stimulate her dormant powers, she wakens from the dreams of ignorance, and opens her eye to the irradiations of wisdom"

"The former [Platonic philosophy] fills the soul with intelligible light, breaks her lethargic fetters, and elevates her to the principle of things; the latter [Lockean philosophy] clouds the intellectual eye of the soul, by increasing her oblivion, strengthens her corporeal bands, and hurries he...

"The spirit of the Gospel 'proclaims liberty to the captive, and the opening of the prison to them that are bound:' but these men rivet the chains of slavery; 'the iron enters into the Negro's soul,' while while his mind is left in all the darkness of ignorance, without one ray of those comforts ...

"Sometimes indeed it happens, that he may be able to mark the time, when from the sight of a picture, a passage in an author, or a hint in conversation, he has received, as it were, some new and guiding light, something like inspiration, by which his mind has been expanded, and is morally sure th...

"In no state of society can a practice, involving in it circumstances of such atrocious and enormous guilt, be considered as defensible by any person whose understanding is not darkened by the turpitude of his heart; in whom not only the feelings of the moral sense are extinguished, but, in this ...

"Will Mr Burke be at the trouble to inform us, how far we are to go back to discover the rights of men, since the light of reason is such a fallacious guide that none but fools trust to its cold investigation?"

"The business of education in this case, is only to conduct the shooting tendrils to a proper pole; yet after laying precept upon precept, without allowing a child to acquire judgement itself, parents expect them to act in the same manner by this borrowed fallacious light, as if they had illumina...

"These are the glowing minds that concentrate pictures for their fellow creatures; forcing them to view with interest the objects reflected from the impassioned imagination, which they passed over in nature."

In a just society "understanding would convert into a real power, no longer an ignis fatuus, shining and expiring by turns, and leading us into sloughs of sophistry, false science and specious mistake"